<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js - pointerlock controls</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<style>
			html, body {
				width: 100%;
				height: 100%;
			}

			body {
				background-color: #ffffff;
				margin: 0;
				overflow: hidden;
				font-family: arial;
			}

			#blocker {

				position: absolute;

				width: 100%;
				height: 100%;

				background-color: rgba(0,0,0,0.5);

			}

			#instructions {

				width: 100%;
				height: 100%;

				display: -webkit-box;
				display: -moz-box;
				display: box;

				-webkit-box-orient: horizontal;
				-moz-box-orient: horizontal;
				box-orient: horizontal;

				-webkit-box-pack: center;
				-moz-box-pack: center;
				box-pack: center;

				-webkit-box-align: center;
				-moz-box-align: center;
				box-align: center;

				color: #ffffff;
				text-align: center;

				cursor: pointer;

			}

		</style>
	</head>
	<body>
		<script src="../build/three.js"></script>
		<script src="js/controls/PointerLockControls.js"></script>

		<div id="blocker">

			<div id="instructions">
				<span style="font-size:40px">Click to play</span>
				<br />
				(W, A, S, D = Move, SPACE = Jump, MOUSE = Look around)
			</div>

		</div>

		<script>

			var camera, scene, renderer;
			var geometry, material, mesh;
			var controls;

			var objects = [];

			var raycaster;

			var blocker = document.getElementById( 'blocker' );
			var instructions = document.getElementById( 'instructions' );

			// http://www.html5rocks.com/en/tutorials/pointerlock/intro/

			var havePointerLock = 'pointerLockElement' in document || 'mozPointerLockElement' in document || 'webkitPointerLockElement' in document;

			if ( havePointerLock ) {

				var element = document.body;

				var pointerlockchange = function ( event ) {

					if ( document.pointerLockElement === element || document.mozPointerLockElement === element || document.webkitPointerLockElement === element ) {

						controlsEnabled = true;
						controls.enabled = true;

						blocker.style.display = 'none';

					} else {

						controls.enabled = false;

						blocker.style.display = '-webkit-box';
						blocker.style.display = '-moz-box';
						blocker.style.display = 'box';

						instructions.style.display = '';

					}

				};

				var pointerlockerror = function ( event ) {

					instructions.style.display = '';

				};

				// Hook pointer lock state change events
				document.addEventListener( 'pointerlockchange', pointerlockchange, false );
				document.addEventListener( 'mozpointerlockchange', pointerlockchange, false );
				document.addEventListener( 'webkitpointerlockchange', pointerlockchange, false );

				document.addEventListener( 'pointerlockerror', pointerlockerror, false );
				document.addEventListener( 'mozpointerlockerror', pointerlockerror, false );
				document.addEventListener( 'webkitpointerlockerror', pointerlockerror, false );

				instructions.addEventListener( 'click', function ( event ) {

					instructions.style.display = 'none';

					// Ask the browser to lock the pointer
					element.requestPointerLock = element.requestPointerLock || element.mozRequestPointerLock || element.webkitRequestPointerLock;
					element.requestPointerLock();

				}, false );

			} else {

				instructions.innerHTML = 'Your browser doesn\'t seem to support Pointer Lock API';

			}

			init();
			animate();

			var controlsEnabled = false;

			var moveForward = false;
			var moveBackward = false;
			var moveLeft = false;
			var moveRight = false;
			var canJump = false;

			var prevTime = performance.now();
			var velocity = new THREE.Vector3();

			function init() {

				camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 1, 1000 );

				scene = new THREE.Scene();
				scene.fog = new THREE.Fog( 0xffffff, 0, 750 );

				var light = new THREE.HemisphereLight( 0xeeeeff, 0x777788, 0.75 );
				light.position.set( 0.5, 1, 0.75 );
				scene.add( light );

				controls = new THREE.PointerLockControls( camera );
				scene.add( controls.getObject() );

				var onKeyDown = function ( event ) {

					switch ( event.keyCode ) {

						case 38: // up
						case 87: // w
							moveForward = true;
							break;

						case 37: // left
						case 65: // a
							moveLeft = true; break;

						case 40: // down
						case 83: // s
							moveBackward = true;
							break;

						case 39: // right
						case 68: // d
							moveRight = true;
							break;

						case 32: // space
							if ( canJump === true ) velocity.y += 350;
							canJump = false;
							break;

					}

				};

				var onKeyUp = function ( event ) {

					switch( event.keyCode ) {

						case 38: // up
						case 87: // w
							moveForward = false;
							break;

						case 37: // left
						case 65: // a
							moveLeft = false;
							break;

						case 40: // down
						case 83: // s
							moveBackward = false;
							break;

						case 39: // right
						case 68: // d
							moveRight = false;
							break;

					}

				};

				document.addEventListener( 'keydown', onKeyDown, false );
				document.addEventListener( 'keyup', onKeyUp, false );

				raycaster = new THREE.Raycaster( new THREE.Vector3(), new THREE.Vector3( 0, - 1, 0 ), 0, 10 );

				// floor

				geometry = new THREE.PlaneGeometry( 2000, 2000, 100, 100 );
				geometry.rotateX( - Math.PI / 2 );

				for ( var i = 0, l = geometry.vertices.length; i < l; i ++ ) {

					var vertex = geometry.vertices[ i ];
					vertex.x += Math.random() * 20 - 10;
					vertex.y += Math.random() * 2;
					vertex.z += Math.random() * 20 - 10;

				}

				for ( var i = 0, l = geometry.faces.length; i < l; i ++ ) {

					var face = geometry.faces[ i ];
					face.vertexColors[ 0 ] = new THREE.Color().setHSL( Math.random() * 0.3 + 0.5, 0.75, Math.random() * 0.25 + 0.75 );
					face.vertexColors[ 1 ] = new THREE.Color().setHSL( Math.random() * 0.3 + 0.5, 0.75, Math.random() * 0.25 + 0.75 );
					face.vertexColors[ 2 ] = new THREE.Color().setHSL( Math.random() * 0.3 + 0.5, 0.75, Math.random() * 0.25 + 0.75 );

				}

				material = new THREE.MeshBasicMaterial( { vertexColors: THREE.VertexColors } );

				mesh = new THREE.Mesh( geometry, material );
				scene.add( mesh );

				// objects

				geometry = new THREE.BoxGeometry( 20, 20, 20 );

				for ( var i = 0, l = geometry.faces.length; i < l; i ++ ) {

					var face = geometry.faces[ i ];
					face.vertexColors[ 0 ] = new THREE.Color().setHSL( Math.random() * 0.3 + 0.5, 0.75, Math.random() * 0.25 + 0.75 );
					face.vertexColors[ 1 ] = new THREE.Color().setHSL( Math.random() * 0.3 + 0.5, 0.75, Math.random() * 0.25 + 0.75 );
					face.vertexColors[ 2 ] = new THREE.Color().setHSL( Math.random() * 0.3 + 0.5, 0.75, Math.random() * 0.25 + 0.75 );

				}

				for ( var i = 0; i < 500; i ++ ) {

					material = new THREE.MeshPhongMaterial( { specular: 0xffffff, shading: THREE.FlatShading, vertexColors: THREE.VertexColors } );

					var mesh = new THREE.Mesh( geometry, material );
					mesh.position.x = Math.floor( Math.random() * 20 - 10 ) * 20;
					mesh.position.y = Math.floor( Math.random() * 20 ) * 20 + 10;
					mesh.position.z = Math.floor( Math.random() * 20 - 10 ) * 20;
					scene.add( mesh );

					material.color.setHSL( Math.random() * 0.2 + 0.5, 0.75, Math.random() * 0.25 + 0.75 );

					objects.push( mesh );

				}

				//

				renderer = new THREE.WebGLRenderer();
				renderer.setClearColor( 0xffffff );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				document.body.appendChild( renderer.domElement );

				//

				window.addEventListener( 'resize', onWindowResize, false );

			}

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

			}

			function animate() {

				requestAnimationFrame( animate );

				if ( controlsEnabled ) {
					raycaster.ray.origin.copy( controls.getObject().position );
					raycaster.ray.origin.y -= 10;

					var intersections = raycaster.intersectObjects( objects );

					var isOnObject = intersections.length > 0;

					var time = performance.now();
					var delta = ( time - prevTime ) / 1000;

					velocity.x -= velocity.x * 10.0 * delta;
					velocity.z -= velocity.z * 10.0 * delta;

					velocity.y -= 9.8 * 100.0 * delta; // 100.0 = mass

					if ( moveForward ) velocity.z -= 400.0 * delta;
					if ( moveBackward ) velocity.z += 400.0 * delta;

					if ( moveLeft ) velocity.x -= 400.0 * delta;
					if ( moveRight ) velocity.x += 400.0 * delta;

					if ( isOnObject === true ) {
						velocity.y = Math.max( 0, velocity.y );

						canJump = true;
					}

					controls.getObject().translateX( velocity.x * delta );
					controls.getObject().translateY( velocity.y * delta );
					controls.getObject().translateZ( velocity.z * delta );

					if ( controls.getObject().position.y < 10 ) {

						velocity.y = 0;
						controls.getObject().position.y = 10;

						canJump = true;

					}

					prevTime = time;

				}

				renderer.render( scene, camera );

			}

		</script>
	</body>
</html>
